Abstract
In developing high-performance electrode materials for ion batteries, manifold methods to assemble definite structures of graphene-SnOx composite anodes are presented. Here we have firstly put forward an efficient strategy based on fortissimo penetration from γ-ray irradiation to assemble graphene and Sn/SnO2 composite, which is formed by a large-scale and simple synthesis method. And uniform SnO2 and Sn nanoparticles sandwiched between graphene sheets (sandwich-like Sn/SnO2 @ graphene composite) are fabricated due to the synergism of interlamellar limitation of graphene oxide and ultra-strong penetration and high energy of γ-ray, which help to improve conductivity of Sn/SnO2 and can prevent Sn/SnO2 agglomeration and volume expansion due to graphene sheets buffed. High initial capacity about 2970.3 mAh g−1 and stable cycle performance are exhibited. This facile method has potential prospects to offer an attractive alternative approach for preparation of metal nanoparticles/graphene composite as high performance electrodes for Li/Na-ion batteries.
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